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Mathematics
Mathematics
Problem
If a circle, whose centre is
(
−
1
,
1
)
(-1, 1)
(
−
1
,
1
)
touches the straight line
x
+
2
y
=
12
x + 2y = 12
x
+
2
y
=
12
, then the co-ordinates of the point of contact are a.
(
−
7
2
,
−
4
)
\left(-\frac{7}{2}, -4\right)
(
−
2
7
,
−
4
)
b.
(
−
18
5
,
−
21
5
)
\left(-\frac{18}{5}, -\frac{21}{5}\right)
(
−
5
18
,
−
5
21
)
c.
(
2
,
−
7
)
(2, -7)
(
2
,
−
7
)
d.
(
−
2
,
−
5
)
(-2, -5)
(
−
2
,
−
5
)
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